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<head>
	<meta charset="UTF-8">
	<title>Document</title>
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<body>
	<script type="text/javascript">
		console.log(typeof(1));//number
		console.log(typeof("abc"));//string
		console.log(typeof(true));//boolean
		console.log(typeof(m));//undefined
		console.log(typeof({}));//object
		console.log(typeof(function(){}));//function
	</script>
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